Tube blank



M. O. SCHUR TUBE BLANK Aug. 24, 1965 3 Sheets-Sheet 1 Filed Sept. 4, 1962 INVENTOR. MILTON O. SCHUR A TTOPNEV M. O. SCHUR Aug. 24, 1965 TUBE BLANK 3 Sheets-Sheet 3 Filed Sept. 4, 1962 FIG-6 INVENTOR. M/LTO/V 0. SO /UP FIG- 9 ATTOP/VEV United States Patent o senor, New

Milton present invention relates to containers and relates in particular to tubular segments which are convertible into containers.

More s ecificnlly, the invention relates to convolutely wound tube bodies which are convertible into tube segments and thence into containers.

The invention also includes a novel blank of fiat stock material and a novel method of fabricating the blank.

The language wound convoiutely is intended to d note a generally concentric winding of sheet stock material into a tubular formation Where there is substantially no lead (no helix is generated) or axial advance of a given layer of stock relative to an adjacent layer as ordinarily occurs in helically wound tubular bodies already well known in the art.

A feature of the invention is. the provision of a novel blanl: of stock material which is convertible into a tubular body and further convertible into a tubular segment.

The term blank is intended to designate composite or unitary stool: material in the form of fiat sheets or in the form of a roll of stock material susceptible of unwinding and of continuously advancing to a cutting station where the stock is converted continuously into fiat sheets by a suitable cutting operation.

A further feature of the invention is the provision of a novel blank of stock which is convertible into a tube body and further convertible into a plurality of tube segments where each blank carries a repetitive pattern of indicia so spaced that a single pattern of indicia is individual to a corresponding tube segment ultimately formed.

A still further feature of the invention is the provision of a novel blank or" stock material which is convertible into tube bodies and thence into tube segments Where one side of tr e blank carries a repetitive pattern of label indicia and the other side thereof carries at least two patterns defining an adhesive pattern and a barrier material pattern.

A further feature or" the invention is the provision of a novel tube segment fabricated by convolutely winding 21 blanli of stock material Where the blank is formed cornpositely of body stock, label stock and barrier material stock.

A blank embracing certain features of the present in vention and useful to create a tube body by convolute winding may comprise a sheet or web of body stock having a repetitive label indicia laminated (or printed) on one side of the stock and a coating or filrn of barrier material laminated to the opposite side of the stock to define a first pattern and a coating of adhesive applied to the said opposite side to define a second pattern.

Other features and advantages of the present invention will become more apparent when read in conjunction with the appended drawings in which:

PEG. 1 is a cross-section of a typical tube segment made in accordance with the present invention;

FIG. 2 is a perspective view of a typical finished tube segment;

PEG. 3 is a plan view of a tube blank prior to winding;

FIG. 4 is end view of the blank of PEG. 3;

FIG. 5 is a view of the bottom side of the blank of FIG. 3;

PEG. 6 is a top plan view of a double anlc,

rl-G. 7 is an end view of the blank of MG. 6;

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FIG. 8 is a corresponding view of the bottom side of said tube blank;

The reference numeral 1% designates a Web of body stock which, in the illustrated embodiment of the inven tion, is a Web of kraft paper.

The body stock lltl is laminated to a barrier material 18 which, in the disclosed embodiment of the invention, is a Web of polyvinylidene chloride.

Depending upon the liner requirements of the containers ultimately fabricated from the tube segments produced by the practice of the present invention, it is contemplated that various barrier materials may be utilized and applied to the body stock by laminating a web thereto (as in the present disclosure, for example) or the barrier material may be applied to the body stock in the form of a coating by painting, spraying or utilization of a doctor blade.

A roll of label stock in the form of a Web 2% having printed thereon, repetitively, a commercial label indicia is laminated to the underside of the body stock It) to produce a web of composite stock.

The repetitive character of the label indicia must be correlated with the axial length and number of individual tube segments, ultimately fabricated, so that one pattern of label indicia becomes individual to each tube segment. That is, the label indicia 24 must be oriented relative to the stock 1 and the side of the label indicia pattern must be so selected that the exterior surface of the finished tube segments carries a Well oriented, symmetrically arranged label pattern.

Obviously the invention contemplates that the repetitive label indicia can be applied to the underside of the body stock lit by direct printing thereon as surface conditions and as manufacturing procedures of the body stock permit.

As will be more apparent hereinafter and as shown in FIGS. 1 and 2, label stock indicia ultimately appear on the interior of the finished tube segment while the barrier material 18 falls on the interior of the finished segment.

Frequently it is desirable to protect or seal the edge 28 (FIG. 1) of the body stock ill with barrier material to avoid presenting any uncoated surface to products ultimately packaged within the tube segment.

If edge scaling is desired, the barrier material 18 is displaced slightly relative to the body stock iii (displaced upwardly as viewed in FIG. 3) to provide a margin of barrier material projecting over the body stock it A suitable edge folding device is provided to fold continuously a projecting margin over and around the edge 28 of the body stock lit to provide a narrow ribbon 32 of barrier stock upon the bottom or underside of the body stock as is most apparent in FIG. 1 and in PEG, 3.

The ribbon 32 is particularly useful when it is desired to seal the barrier material directly to barrier material to make a lap seam such as the lap seam indicated by the reference numeral 33 in FIG. 1.

Obviously when the barrier material is applied by spraying, painting or doctor blades, it is anticipated that suitable applicators will be utilized to coat the edge 28 and to develop the ribbon or band As stated previously, barrier material 18 applied to the body stock til may be sometimes referred to hereinafter as a first pattern.

in the disclosed embodiment of the invention, the barrier material is poly vinylchloride.

The second pattern, in the disclosed embodiment of the invention, comprises a ribbon of a suitable plastisol identified by the reference numeral an. in FIGS. 3 and 4- effective to provide a tight seal in the longitudinal seam 33. A plastisol compatible with a barrier of poly vinylchloride is comprised of a Saran type oly vinylidene resin dissolved in three parts of an equal mixture of tetrahydrofuran and toluene.

Depending upon the particular barrier material utilized, it may be'necessary to adjust or change the nature of the compound applied to insure a proper sealing reaction with the barrier material. a

The third pattern on the top of the composite stock as Viewed. in FIGS. 3 and 4 comprises a coating of adhesive 42.

Thus, by way of review, the top side of tube blank 36, the details of which are shown in FIGS. 3, 4 and 5 are coated with at least three patterns defining a first pattern of barrier material 18 and a second pattern of barrier activator material 41, such as an adhesive, operable to seal two layers of barrier material to define alap seam 33 (FIG. 1). a

The third pattern comprises the adhesive coating 42 used to bind the convolutions of body stock together also apparent in FIG. 1. V

The reference numeral 113 of FIG. 1 discloses a representative embodiment of the tube body developed and the result is a multi-ply wall structure comprising several layers of body stock 10, barrier material 18, adhesive 42, label stock 20 with barrier material sealer material 41.

The label side of the blanks carry a number of complete representations ofrepetitive label indicia indicated by the legend LABEL where the number of" complete reprea sentations of the repetitive indicia corresponds to the number of tube segments ultimately fabricated.

That is, a blank bearing five complete representations or" label indicia is a blank which is convertible into five tube segments.

Obviously the invention is not limited to the number of tube segments fabricated from each blank.

Obviously, the width of the blank (see FIG. 3) conthe label stock 20 may be offset relative to the composite stock 10 to develop a margin or tail 181 to provide a I smooth termination or lap seam for the label stock.

trols the number of layers of plies in the wall of the tube body developed.

i The width is not critical so long as there is at least a partial overlap of the leading and trailing edges of the blank.

Double blank Referring now to FIGS. 6, 7 and 8, there is shown an alternative blank structure, hereinafter referred to as a double blank, useful in the practice of the present invention when it is desired to feed two turret devices simul-' taneously.

For purposes of establishing perspective relative to the blank'and its direction of advance towards two tube formers, consider the double blank of FIG. 6 cut into two symmetrical single blanks along the line referenced 166.

Thus, the leading edge of blank X is referenced 167 and the leading edge of blank Y is referenced 168, and their direction of advance toward the tube forming turret is indicated by the arrows referenced 169 and 171, respectively. l

Obviously, the trailing edge of each blank X and Y coincides with the line referenced 166.

Prior to cutting the blank is laminated with a double width repetitive label pattern 172 and a double width adhesive pattern 173. Each margin of thedouble blank is laminated with a barrier material pattern 174 and 176.

Opposed edges of the blank are covered with barrier material by return bend portions referenced 177 and 178 and a pattern of barrier activator appears referenced 179 and 181.

The tail 181 eliminates'the step 182 that would otherwise occur at the training edge of the blank. Alternatively the label stock may fall flush with the trailing edge of the blank as desired.

It is anticipated that a wide variety of modifications may be devised in the blank structure of the present invention without departing from the spirit and scope of the invention. V a

I claim:

1. A blank for conversion into a convolutely wound tube body comprising a web of' body stock having a repetitive formation of label indicia on one side thereof, a coating of barrier material on the opposite side of the stock defining a first pattern, a coating of adhesive applied to said opposite side of the stock to define a second pattern and a ribbon of barrier material activator on said opposite side overlaying said first pattern to define a third pattern, said barrier material extending over and around one edge of said body stock to define a narrow ribbon of barrier material on the label side of said stock.

2. A blank for conversion into twoconvolutely wound tube bodies comprising a double width web of body stock having at least two repetitive formations of label indicia' on one side thereof and two coatings of barrier material on the opposite side of the stock defining two first patterns, a coating of adhesive applied to said opposite side of the stock to' define a single second pattern, two coatings of barrier activator on said opposite side overlaying each said first pattern to define two third patterns, each said barrier material pattern extending over and around opposed edges of the body stock to define two narrow margins of barrier material on. the label side of said stock.

References fitted by the Examiner UNITED ,STATESPATENTS Faber 93-81 1,635,057 7/27 Piermattei 9381 2,048,895 a 7/36 Rosen 229--87 2,335,202 11/43 Wilcox 229-45 2,341,415, 2/44. Adams 22987 2,347,236 4/44 Barbieri 229-45 2,988,970 6/61 Geist 9394 3,030,001 4/62 Stump 22951 3,036,503 5/62 Geist 9394 3,096,014 7/63 SWan 22987 JOSEPH R. LEcLArKn-imm Examiner.

FRANK E. BAILEY, FRANKLIN T. GARRETT,

. Examiners. 

1. A BLANK FOR CONVERSION INTO A CONVOLUTELY WOUND TUBE BODY COMPRISING A WEB OF BODY STOCK HAVING A REPETITIVE FORMATION OF LABEL INDICIA ON ONE SIDE THEREOF, A COATING OF BARRIER MATERIAL ON THE OPPOSITE SIDE OF THE STOCK DEFINING A FIRST PATTERN, A COATING OF ADHESIVE APPLIED TO SAID OPPOSITE SIDE OF THE STOCK TO DEFINE A SECOND 